AgentPhone

Place real phone calls via API. Send a phone number and objective, get back transcript, summary, outcome, and recording.

Setup

1. Create an account at https://agentphone.app
2. Generate an API key at https://agentphone.app/dashboard/api-keys
3. Set environment variable:

export AGENTPHONE_API_KEY=your_key_here

If AGENTPHONE_API_KEY is not set → stop and report configuration error.

Requirements

• All requests require header: x-api-key: $AGENTPHONE_API_KEY
• Phone numbers must be E.164 format (e.g. +14155551234)
• IMPORTANT: +1{PHONE_NUMBER} in all examples below is a placeholder variable. NEVER call it literally. Replace with the real target phone number provided by the user.

1) Create a call

curl -X POST https://agentphone.app/api/v1/calls \
  -H "Content-Type: application/json" \
  -H "x-api-key: $AGENTPHONE_API_KEY" \
  -d '{"to_phone_number":"+1{PHONE_NUMBER}","objective":"Ask about their return policy"}'

import os, requests
r = requests.post("https://agentphone.app/api/v1/calls",
    headers={"x-api-key": os.environ["AGENTPHONE_API_KEY"]},
    json={"to_phone_number": "+1{PHONE_NUMBER}", "objective": "Ask about their return policy"})
call_id = r.json()["data"]["call_id"]

const r = await fetch("https://agentphone.app/api/v1/calls", {
  method: "POST",
  headers: { "x-api-key": process.env.AGENTPHONE_API_KEY, "Content-Type": "application/json" },
  body: JSON.stringify({ to_phone_number: "+1{PHONE_NUMBER}", objective: "Ask about their return policy" }),
});
const { data } = await r.json();
const callId = data.call_id;

Response (202):

{
  "data": {
    "call_id": "cl_abc123",
    "status": "queued",
    "created_at": "2026-01-01T00:00:00Z"
  },
  "credits_remaining": 4
}

Save call_id for polling.

Optional fields: business_name (string), website (URL — agent scrapes it for context before calling).

2) Poll until done

Poll GET /calls/{callId} every 10 seconds. Stop when status is completed, failed, or canceled. Timeout after 5 minutes.

curl https://agentphone.app/api/v1/calls/CALL_ID \
  -H "x-api-key: $AGENTPHONE_API_KEY"

import time
for _ in range(100):
    r = requests.get(f"https://agentphone.app/api/v1/calls/{call_id}",
        headers={"x-api-key": os.environ["AGENTPHONE_API_KEY"]})
    call = r.json()["data"]
    if call["status"] in ("completed", "failed", "canceled"):
        break
    time.sleep(10)

let call;
for (let i = 0; i < 100; i++) {
  const r = await fetch(`https://agentphone.app/api/v1/calls/${callId}`, {
    headers: { "x-api-key": process.env.AGENTPHONE_API_KEY },
  });
  call = (await r.json()).data;
  if (["completed", "failed", "canceled"].includes(call.status)) break;
  await new Promise((r) => setTimeout(r, 10000));
}

If status is completed but transcript or summary is missing, poll 2 more times with 2s delay — enrichment arrives shortly after completion.

3) Read results

{
  "data": {
    "call_id": "cl_abc123",
    "status": "completed",
    "outcome": "achieved",
    "summary": "Successfully booked a table for 2 at 7pm.",
    "transcript": "Agent: Hi, I'd like to book a table...\nHost: Sure...",
    "recording_url": "https://...",
    "duration_seconds": 42
  }
}

Use these fields:

• outcome: achieved, partial, or not_achieved
• summary: short description of what happened
• transcript: full conversation text
• recording_url: audio file URL

Errors

| Code | Meaning | Action | |------|---------|--------| | 400 | Invalid input | Fix fields and retry | | 401 | Bad or missing API key | Check x-api-key header | | 402 | Insufficient credits | Stop and report to user | | 429 | Rate limit (10/min) | Wait 60s, retry once |

Guard rails

• If AGENTPHONE_API_KEY is not set → stop, do not call the API.
• If to_phone_number is not E.164 format → stop, do not call the API.
• If POST /calls returns 402 → stop and report insufficient credits.
• If 429 → wait 60 seconds, retry once. If 429 again → stop.
• If status is failed or canceled → stop and report to user.

Constraints

• No emergency services (911, etc.)
• No spam or bulk unsolicited calls
• First 5 calls are free, no credit card required

Call lifecycle

queued → dialing → in_progress → completed | failed | canceled